如何通过编译标志到cmake初始编译测试? [英] How to pass a compile flag to cmake initial compiler test?

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问题描述

我想使用CMake构建一个项目,该项目使用 MSPGCC交叉编译器用于MSP430微控制器。要成功编译任何简单的程序,我们需要传递一个编译标志指示目标处理器,否则它会失败,如下所示:

I'm trying to use CMake for building a project which uses the MSPGCC cross-compiler for a MSP430 microcontroller. To successfully compile any simple program with it, we need to pass a compile flag indicating the target processor, or else it fails like this:

$ msp430-gcc -o test test.c
In file included from test.c:1:0:
/usr/local/lib/gcc/msp430/4.6.3/../../../../msp430/include/msp430.h:813:2: warning: #warning Unable to identify and include MCU header, use -mmcu=MCU [-Wcpp]
/usr/local/lib/gcc/msp430/4.6.3/../../../../msp430/bin/ld: cannot open linker script file memory.x: No such file or directory
collect2: ld returned 1 exit status

因此,如果我指示处理器使用 -mmcu switch它工作正常。问题是,虽然我已经在我的 CMakeLists.txt 文件中指定:

Hence, if I indicate the processor using the -mmcu switch it works fine. The problem is, although I'm already specifying this in my CMakeLists.txt file:

cmake_minimum_required (VERSION 2.6)

project (test-project C)

set (SOURCES
  test.c
  )

add_executable (test-project ${SOURCES})
set (CPU_FLAG "-mmcu=msp430f148")

set (CMAKE_C_FLAGS ${CPU_FLAG})
set (CMAKE_EXE_LINKER_FLAGS ${CPU_FLAG})

CMake抱怨编译器无法通过测试编译一个简单的程序,可能不使用 -mmcu 开关(请注意有关无法打开链接描述文件memory.x的消息):

CMake complains the compiler failed the test to compile a simple program, which I bet is happening because it is probably not using the -mmcu switch (note the message about not being able to open linker script file memory.x):

$ cd ~/git/test-project
$ mkdir build
$ cd build
$ cmake -DCMAKE_TOOLCHAIN_FILE=../msp430.cmake ..
-- The C compiler identification is GNU 4.6.3
-- Check for working C compiler: /usr/local/bin/msp430-gcc
-- Check for working C compiler: /usr/local/bin/msp430-gcc -- broken
CMake Error at /usr/share/cmake-2.8/Modules/CMakeTestCCompiler.cmake:52 (MESSAGE):
  The C compiler "/usr/local/bin/msp430-gcc" is not able to compile a simple
  test program.

  It fails with the following output:

   Change Dir: /home/claudio/git/test-project/build/CMakeFiles/CMakeTmp



  Run Build Command:/usr/bin/gmake "cmTryCompileExec2889462763/fast"

  /usr/bin/gmake -f CMakeFiles/cmTryCompileExec2889462763.dir/build.make
  CMakeFiles/cmTryCompileExec2889462763.dir/build

  gmake[1]: Entering directory
  `/home/claudio/git/test-project/build/CMakeFiles/CMakeTmp'

  /usr/bin/cmake -E cmake_progress_report
  /home/claudio/git/test-project/build/CMakeFiles/CMakeTmp/CMakeFiles 1

  Building C object
  CMakeFiles/cmTryCompileExec2889462763.dir/testCCompiler.c.o

  /usr/local/bin/msp430-gcc -o
  CMakeFiles/cmTryCompileExec2889462763.dir/testCCompiler.c.o -c
  /home/claudio/git/test-project/build/CMakeFiles/CMakeTmp/testCCompiler.c

  Linking C executable cmTryCompileExec2889462763

  /usr/bin/cmake -E cmake_link_script
  CMakeFiles/cmTryCompileExec2889462763.dir/link.txt --verbose=1

  /usr/local/bin/msp430-gcc
  CMakeFiles/cmTryCompileExec2889462763.dir/testCCompiler.c.o -o
  cmTryCompileExec2889462763 -rdynamic

  /usr/local/lib/gcc/msp430/4.6.3/../../../../msp430/bin/ld: cannot open
  linker script file memory.x: No such file or directory

  collect2: ld returned 1 exit status

  gmake[1]: Leaving directory
  `/home/claudio/git/test-project/build/CMakeFiles/CMakeTmp'

  gmake[1]: *** [cmTryCompileExec2889462763] Error 1

  gmake: *** [cmTryCompileExec2889462763/fast] Error 2





  CMake will not be able to correctly generate this project.
Call Stack (most recent call first):
  CMakeLists.txt:3 (project)

-- Configuring incomplete, errors occurred!

只是为了记录,我的工具链文件如下,我的PATH变量允许它找到 / usr / local / bin 下的编译器二进制文件:

Just for the record, my toolchain file is as follows, and my PATH variable allows it to find the compiler binaries at /usr/local/bin:

# the name of the target operating system
#SET(CMAKE_SYSTEM_NAME Linux)

# which C and C++ compiler to use
SET(CMAKE_C_COMPILER   msp430-gcc)
SET(CMAKE_CXX_COMPILER msp430-g++) 

# here is the target environment located
SET(CMAKE_FIND_ROOT_PATH  /usr/local/msp430) 

# adjust the default behaviour of the FIND_XXX() commands:
# search headers and libraries in the target environment, search 
# programs in the host environment
set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)

据说,任何人都可以告诉我如何检查CMake使用的编译标志以便进行编译器测试,我们如何传递自定义标志(例如 -mmcu ),以便不会失败?

All that said, can anyone tell me how to check which compile flags CMake is using to carry the compiler test, and how can we pass custom flags (like -mmcu, for instance) so it doesn't fail it?

推荐答案

根据文档:

http://www.cmake.org/Wiki/CMake_Cross_Compiling#The_toolchain_file

你应该使用CMakeForceCompiler的东西

you should use the CMakeForceCompiler thing

INCLUDE(CMakeForceCompiler)

# this one is important
SET(CMAKE_SYSTEM_NAME eCos)

# specify the cross compiler
CMAKE_FORCE_C_COMPILER(arm-elf-gcc GNU)
CMAKE_FORCE_CXX_COMPILER(arm-elf-g++ GNU)

# where is the target environment 
SET(CMAKE_FIND_ROOT_PATH  /home/alex/src/ecos/install )

# search for programs in the build host directories
SET(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
# for libraries and headers in the target directories
SET(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
SET(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)


b $ b

(从文档复制和粘贴)

(copy&paste from the docs)

在我的MSP430中使用它也很好

Using it fine here for my MSP430 too

这篇关于如何通过编译标志到cmake初始编译测试?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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